Relay.



C. W. COLEMAN, DECD.

K. COLEMAN, ADMIN STRATRIX.

i RELAY.

APPLICATION FILED J N- I6. 1911.

Patented Mar. 7, 1916.

2 SHEETS-SHEET 1- I PHMANNT MAG/YE T H N M M W M H Iizverzto 2 am m me w mf 0 M f e m 0 mm n 037 m m g c K W 0 q M C. W. COLEMAN, DECD.

K. COLEMAN, ADMINISTRATRIX.

RELAY.

APPLICATION FILED JAN-16,1911- Patented Mar. 7, 1915.

Z SHEETSSHEEI 2.

Inventor.

cLARENcnw. COLEMAN, nnc'nnsnn, LATE or wEsrrIn n, Nnw'JEnsnY, BY KATH- ARINE COLEMAN, ADMINISTRATRIX, OF WESTFIELD, NEW JERSEY, ASSIGNOR, BY

MESNE ASSIGNMENTS, TO I A CORPORATION OF MAINE specification of Letters Patent.

Patented Mar. 7, 1916.

Original application filed Hay}, 1909,'Seria1 No. 494,665.- Divided and this application filed January 16,

To all whom it may concern:

Be it known that CLARENCE COLEMAN, deceased, late of VVestfield, State of New Jersey,-did invent certain new and useful Improvements in Relays, of which the following is a specification.

The invention relatesto relays, and more particularly to relays operated by a pulsat- ,movement, asby being connected ing or alternating current. I

The object of the invention is to provide a simple and'efiicient relay of thevibratory reed type which may be utilized as a selective relay; this application being a division of a former application for railway signaling systems, filed May 7th, 1909, Serial No. 494665.

The invention involves the provision of a relay so constructed that it will be actuated to maintain its circuit closed when, and only when, the current in its coil is of a definite frequency. The relay may have but a single winding which may be connected'direc'tly to any suitable source of pulsating or alternating current, but in either case the selective action is not dependent upon any apparatus external to the relay'itsel-f. Specifically the inventor provided as the armature of the relay a vibratory permanently magnetized rec'd which will be caused to vibrate by the field magnet of the relay. only when the field is energized by a current of a frequency corresponding substantially to the natural period of vibration of the reed, and caused the con-- :tinued vibration of the reed to maintain the closure of a circuit which is independent of the reed. This is eflected by causing the contact actuated by the reed to be sluggish in its toa dash- I pot; Thus the inventor obtained the select1ve' action of such a vibratory reed armature .without theintermittent closure of any circuit'with the obvious disadvantages accom panying the same, r I The invention ,will be best understood by the following description, taken in connection with the accompanying drawings, in which :','Figure 1 is a side elevation of the preferred form of the relay; Fig. 2 is a' plan View of the same; Fig. 3 is a side elevation of a modification;

of the same.v

and 4 a plan view -.Referring to the drawings, Fig. 1, 1 is a county of Union, 7

- provided with standards 4 from armature'IO, while the v which is sluggish to allow Serial No. 602,911.

relay coil having a soft iron core 2, preferably secured to one end of the form of a permanent magnet which is and 5 at each end forming partof the magnetic circuit. Upon the standard 4 is sectlreda projection 6, havmg a bifurcated vertical shoulder 7 provided with a longitudinally adjustable screw. 8, adjusted by means of a nut 9. A vibratory armature 10, in the form pletes the magnetic circuit and is detachably secured at its rear end to the screw 8, so that the armature may be moved back and forth over the core of the magnet by manipulating nu 9. Y

The standard 4 preferably has its top surface cored out, as shown, to provide shoulders 11 and 12, upon which the armature 1,0 rests. The upper surface should besubstantially in the same horizontal plane with thecenter of-the screw 8, so

that the armature will rest easily upon both.

The standard 4 is provided with the cored out cap plate 13, having offset shoulders registering with the shoulders 12 and 13, for firmly gripping the armature 10 down on the standard, so that the vibration of the armature will take place from the outer end of shoulder 11. v

A switch lipreferably formed of resilient 7 metal and having arms 15 and 16, is mounted The extremity of arm-l5is preferably provided with a tip to receive the impulses arm 16 is 'pivotally connected ment of with one elea dash-pot 17, the other element of secured to a projection from the base-plate. The dash-pot is filled with a liquid, preferably alcohol, and is for the purpose of retarding the movements of switch 14:, so that its movements will be too tact in unison with armature 10, asa result of a base plate 3, in r of a steel reed, comof these shoulders.

outer end of it to make and'break conwhich the switch will be held in engagement with contact 18 during the vibrations of armature 1,0.

After the armature has been adjusted by the nut 9 to its supposed proper length, it

is gripped tightly upon the shoulders 12 and 13 by screwing down the cap plate, and the coil 1 is energized. If the natural period of vibration of the armature, as adjusted, is in resonance with the period of magnetic vibration set up in the coil. that is, if the natural number of vibrations per unit of time of the armature-be the same as the number of cycles per unit of time of the current in the coil, then the armature will respond to-the so-called magnetic vibrations set up by the coil, and will vibrate back and forth in unison with the reversals of current in the coil, thus giving a continuous I is the same as rain of hammer blows upon the end of lever 15, forcing the switch 14 in engagement with contact 18 to close the signal circuit. The switch is held in its closed position by the dash-pot 17 which damps the vibrations of the switch member so as to prevent any possibility of the switch vibrating in unison with the armature 10. If the length of the armature is such that its own period of vibration is substantiallydilierent from the magnetic vibration set up in the coil, then the armature will be unable-to vibrate with sufiicient amplitude toimpinge upon the end of lever 15 to close the signal. circuit, in which case the cap plate 13 is loosened up and the armature readjusted; after which the cap plate is again tightened up, and so on until the proper adiustment is secured.

Fig. 3 shows a modified form of relay, in which two vibratory armatures are uti lized for operating the switch 1 one being mounted at each end of the perman tly magnetized base-plate.' These vibr armatures being secured to opposite poles of the permanent magnet, are oppositely polarized, that is, the north pole of one and the south pole of the other are situated over the relay core, so that for each complete magnetic cycle in the core,-the switch 14 will receive two blows, one from each armature, while with the single vibratrliry armature the switch receives but oneb ow for each magnetic cycle in the core. and adjustment of this relay that shown in Fig. 3, the only difference in the relays being in the relative The operation position of the parts to accommodate the second vibrating armature.

The standards 4 4: for carrying the vibrating arms, as shown in Fig. 3, are mounted at the ends of the. permanently magnetized base-plate, and secured to the same plate adjacent to one of the standards is an upright 19, upon which is pivoted the switch 14, and at'the upper end the insulated contact 18. A second upright of which is secured eratim lever 15 and vibratirr armatures complete the magnetic circuit.

One advantage of the two oppositely polarized vibrating armatures over the single armature is that the period between blows upon switch 14: is reduced by half, since the blows are alternately struck by the two armatures, giving a more continuous action and thus preventing switch 14 from vibrating with either of them to make and break its circuit. 7 Another arinatures is that the switch willv be held closed by the vibrations of one, should the other become broken or otherwise thrown out of order.

Although I have described the improvements in great detail, nevertheless I do not desire to be limited to such details except as clearly pointed out in the appended claims. since many changes and modifications may well be made without departing from'the spirit and scope of the invention in its broadest aspects.

l' vhat I claim as new and desire to secure by Letters Patent, is:

1. In a relay, the combination of a coil to be energized by a suitable source of current, a plurality of oppositely polarized vibrating armatures cooperatively related to said coil, constructed to be operated -responsive only to a current in said coil of a substantiall predetermined fre uenc and a advantage in the use of two synchronism with the current to be used in said coil, and a switch member controlled by the vibrations of said armatures.

3. In a relay, the combination of a. coil,

a plurality of oppositely polarized armatures constructed to be vibratory in synchronism with the current to be used in said coil, and a switch member operated by the force of a series of impulses fromsaid .ar-

matures.

4. In a relay, the combination of a'coil, a plurality of oppositely polarized armatures constructed to be vibratory in synchronism with the current to be used in said' coil. and a pivoted switch member having a. different period ofvibration -from said armatures arrangedto be'moyed to a given position and there maintained by the vihra tions of said armatures.

of said reeds.

5.1a a relay, the'combination of a coil; a permanent magnet, a vieratory reed at each pole of said magnet and cc'ofperatively related to said coil, and a switch'member controlled by the vibrations of said reeds.

6. In a relay, the combination ofa coil, a permanent magnet, a plurality ofjoppositely polarized vibrating reeds cooperatively relatd With said coil, and magnet,- and a switch member ccntiblled by the Vibrations 7. In a relay,the combination of a coil, a oennanent magnet, a soft iron core for said coil, a vibratory reed at each pole of said magnet and cooperatively related to said core, and a switch member having a dinerent period of vibration from'said reeds and arranged to be moved to a given-'Xposition and there maintained by the vibrations of said reeds.

8. In a relay, the combination of a polar;

ized magnet comprising a base piece with projections at each end constituting the opposite poles of the magnet, a plurality of yibratory reedarmatures one for each pro I ection extendmg' into proximity to each other at a point between the said projeo' tions, means for adjusting the length of the vibratory portion of each reed extending beyond-the projections, means for rigidly ot the reeds, a-coil on said'core for receiving alternatingeurrent to vibrate the reeds,

contacts, and a member actuated by the vim brations of, Said reeds and moved into a given position to close the contacts and maintained in said position by said vibrations. v

In testimony Whereot, I' have jsigned my U name to th s specificat1en,-m the presence;

of two subscribing Witnesses. I

KATHARINE COLEMAN,

Admihdstram'rn of the estate of Clarence Wjalema/mdeceasecl.

Witnesses: l v v V1cro;i D; Boner,

' BERNARD CoWEN. 

